These analyses identify three distinct photosynthetic lineages (the Bacillariophyceae, the Phaeophyceae/ Xanthophyceae and the Chrysophyceae/ Eustigmatophyceae/Synurophyceae) which share a common evolutionary history with nonpigmented oomycetes.

2005) on algal species in three reservoirs in the Parana basin-Irai, Salto do Vau and Rosana, where phytoplankton was distributed in the following classes: Chlorophyceae (32), Cyanophyceae (17), Bacillariophyceae (15), Chrysophyceae (5), Zygnematophyceae (5), Xanthophyceae (3) and Dinophyceae (2).

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